Service???

I became confused when I heard the word 'service' used with these agencies.

Internal Revenue 'Service'
U.S. Postal 'Service'
Telephone 'Service'
Cable TV 'Service'
Civil 'Service'
State, City, County & Public 'Service'
Customer 'Service'

This is not what I thought 'service' meant.

But today, I overheard two farmers talking, and one of them said he had hired a bull to 'service' a few cows..
BAM!!! It all came into focus. Now I understand what all those agencies are doing to us.